Jobber Length Drill Bit: 31/64", 135° Split Point, Black Oxide HSS

These general purpose high-speed steel jobber-length drill bits for metal and plastic have regular spiral flutes that are best suited for nonchipping hard materials such as nonferrous metals, cast iron, and structural steel. High Speed Steel drill bits absorb more shock and vibration than cobalt and carbide, making them suitable for use in manual drilling machines and handheld power tools. Black Oxide coating improves lubricity to reduce friction, minimize heat buildup, and improve wear resistance, chip flow, and tool life. It is a good choice for general purpose drilling and working with soft materials, such as plastic and low-carbon steel, and should not be used with aluminum and nonferrous metals.